[IA64-SGI] - New SN hardware support - cpu_relax

Add a few missing calls to "hint @pause".

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/sn/kernel/bte.c

@@ -215,6 +215,7 @@ retry_bteop:
 	}
 
 	while ((transfer_stat = *bte->most_rcnt_na) == BTE_WORD_BUSY) {
+		cpu_relax();
 		if (ia64_get_itc() > itc_end) {
 			BTE_PRINTK(("BTE timeout nasid 0x%x bte%d IBLS = 0x%lx na 0x%lx\n",
 				NASID_GET(bte->bte_base_addr), bte->bte_num,

arch/ia64/sn/kernel/huberror.c

@@ -76,7 +76,7 @@ void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum)
 	 */
 	REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum));
 	while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND)
-		udelay(1);
+		cpu_relax();
 
 }